Cam boring tool



FIG. 1 is a perspective view of a cam boring tool showing my new design;

FIG. 2 is a side-elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front-elevational view thereof; and

FIG. 5 is a rear-elevational view thereof. 

The ornamental design for a cam boring tool, as shown. 